In England, according to the field-studies of R. H. Richens,[2] "The largest area [of hybridization] is a band extending across Essex from the Hertfordshire border to southern Suffolk.

[8] F1 hybrids between wych and field elm are fully fertile, but produce widely variant progeny.

A second tree nearby, described by Elwes as "similar in habit and foliage" [17] and 130 feet (40 m) tall by 23 feet (7.0 m) in girth in 1912,[18] was confirmed by Nellie Bancroft in a Gardener's Chronicle article in 1934 as a 'Vegeta'-type hybrid;[19] it was propagated by Heybroek in 1958 and cultivated at the Baarn elm research institute as clone P41.

[16] The Oxford zoologist Robert Gunther attributed the larger tree's unusual size to the fact (discovered in 1926) that it had been growing on a phosphate-rich bone-bed, made up of the remains of mammoths and other prehistoric animals.

[5] Examples of mature survivors in the East Anglian hybridisation zone include those near Royston, Hertfordshire, designated 'Elm of the Year, 2004' by Das Ulmen Büro.

[28] There are two notable TROBI Champion trees in the British Isles, one at Little Blakenham, Suffolk, measuring 160 centimetres (5.2 ft) d.b.h.

[32] At least 40 cultivars have been recorded, although some may not have survived Dutch elm disease: Others provisionally identified as Ulmus × hollandica include 'Scampstoniensis' and 'Virens (by Green); 'Purpurea' and 'Louis van Houtte' (by F. J. Fontaine); 'Escaillard' and 'Hillieri' (by Buisman); 'Rugosa Pendula' (by Arnold and Morton arboreta); and Späth's 'Fastigiata Glabra' (by Melville).

[36]) Elm trees in Old Hall Park, East Bergholt, showing a clump of these hybrids, is often considered the finest of Constable's elm-studies.